CVE-2020-8559— Privilege escalation from compromised node to cluster
Quick assessment
Affected
Kubernetes Kubernetes
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Kubernetes（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes kube-apiserver中存在输入验证错误漏洞。攻击者可利用该漏洞提升权限。以下产品及版本受到影响：Kubernetes kube-apiserver v1.6版本至v1.15版本，v1.16.13之前版本，v1.17.9之前版本，v1.18.6之前版本。
Possible ATT&CK Techniques 1 AI
T1133 · External Remote Services
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I. Basic Information for CVE-2020-8559
Vulnerability Information
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Vulnerability Title
Privilege escalation from compromised node to cluster
Source: CVE Program / CVE List V5
Vulnerability Description
The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes kube-apiserver 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes kube-apiserver中存在输入验证错误漏洞。攻击者可利用该漏洞提升权限。以下产品及版本受到影响：Kubernetes kube-apiserver v1.6版本至v1.15版本，v1.16.13之前版本，v1.17.9之前版本，v1.18.6之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Kubernetes | Kubernetes | 1.6 | - |
|
II. Public POCs for CVE-2020-8559
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Proof of Concept exploit for Kubernetes CVE-2020-8559 | https://github.com/tabbysable/POC-2020-8559 | POC Details |
| 2 | This is a PoC exploit for CVE-2020-8559 Kubernetes Vulnerability | https://github.com/tdwyer/CVE-2020-8559 | POC Details |
AI-Generated POC
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Vendor Advisories for CVE-2020-8559 (1)
-
https://security.netapp.com/advisory/ntap-20200810-0004/ x_refsource_CONFIRM
Other References for CVE-2020-8559 (2)
-
https://github.com/kubernetes/kubernetes/issues/92914 x_refsource_MISC
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V. Comments for CVE-2020-8559
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